poppler: reachable Object::getString assertion in AnnotRichMedia class in Annot.c

A reachable Object::getString assertion in Poppler 0.72.0 allows attackers to cause a denial of service due to construction of invalid rich media annotation assets in the AnnotRichMedia class in Annot.c...

CVE-2018-20551

CVE-2018-20551 affects Poppler, specifically an exploit in AnnotRichMedia in Annot.c (Poppler 0.72.0) where a reachable Object::getString assertion can be triggered by crafted rich-media annotations, enabling denial of service. The issue is echoed across multiple security advisories (Ubuntu USN-3...